I have a network / IP relay (SPST) that triggers on receipt of a specific event (in this case audio traffic on a specific RTP port). The relay is simple in operation, closing during traffic (which could range from a few secs to perhaps a minute), and opening when no traffic. I need to connect this relay output to a device that requires a momentary (0.5s) short (a pulse if you like) to switch it on and the same to switch it off. So, my question is how can I couple the relay output (which will be on constantly during receipt of RTP traffic) to switch on/off the device?
Essentially I need a momentary 'short' during start/receipt of traffic (to turn on the device) and another momentary 'short' at the end/finish of the traffic.... but the relay is constantly active during traffic.
Others have asked similar questions and it seems a 555 circuit of some description may provide an answer..... but I just cant find something to match my application.
Any thoughts?
Essentially I need a momentary 'short' during start/receipt of traffic (to turn on the device) and another momentary 'short' at the end/finish of the traffic.... but the relay is constantly active during traffic.
Others have asked similar questions and it seems a 555 circuit of some description may provide an answer..... but I just cant find something to match my application.
Any thoughts?